Questions Asked on
March 28, 2007

  1. physics

    A bowling ball encounters a 0.76m vertical rise on the way back to the ball rack. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 3.80m/s at the bottom of the rise, find the

    asked by Cavin
  2. math (vectors) & physics

    In unit-vector notation, what is the net torque about the origin on a flea located at coordinates (-2.0, 4.0 m, -1.0 m) when forces F1 = (-4.0 N) k and F2 = (-5.0 N) j act on the flea? _____________________________________ Torque is the cross product of

    asked by sam
  3. physics (please check)

    A total resistance of 3 ohms is to be producd by combining an unknown resistor R with a 12 ohm resistor. What is the value of R and how is it connected to the 12 ohm resistor a) 4.0 ohm parallel b) 4.0 ohm in series c) 2.4 ohm in parallel d) 2.4 in series

    asked by susane
  4. Physics- drwls please help

    (a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year

    asked by Jim
  5. chemistry

    I need help setting up a problem to calculate pH during the titration of 20.00ml Of 0.1000M (CH3CH2)3N (Kb= 5.2 x 10-4) with 10.00ml of .1000M HCL. I can do it with a weak acid - strong base but this is a weak base - strong acid and I don't know if its the

    asked by amy
  6. Trig

    What is the exact value of cos 40 degrees cos 50 degrees minus sin 40 degrees sin 50 degrees do you know the formula cos(A+b) = cosAcosB - sinAsinB now compare it with your cos 40 degrees cos 50 degrees minus sin 40 degrees sin 50 degrees

    asked by Michael
  7. Physics

    Calculate the kinetic energy that the earth has because of its rotation about its own axis. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year is

    asked by Jim
  8. algrbra

    Complimentary angles add up to 90º So translate the English into Math. if you let the unknown angle be x then "the measure of the compliment of the angle" -----> 90-x "10 degrees less than three times the measure of the angle" ----> 3x - 10 so....... 90-x

    asked by Reiny
  9. Physics please check

    A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 3.60 m/s at the

    asked by Mary
  10. principles of finances

    according to my interpretation of the question in October they would collect: the 10% of the August sales = .10($10,000) the 20% of the Sept sales = .20($20,000) and the 70% of the Oct sales = .70($30,000) Do the arithmetic and add them up A project has an

    asked by Reiny
  11. trig

    express this in sinx (1/ cscx + cotx )+ (1/cscx- cotx) i got 2sinx is that right?? and B) express in cosx problem: is 1 + cotx/cscx - sin^2x i get to the step of 1 + cos-sin^2x and im stuck..help! (1/cscx + cotx) + (1/cscx - cotx) = (sinx + cosx/sinx) +

    asked by linds
  12. physics

    lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.240 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg plate of food and a 0.300 kg cup of coffee. Obtain the force

    asked by CJ
  13. Chem

    This is a lab concerning activity serious of metals and calculation of electrode portentions... Complete the following: if there is NO reaction write NR: (They provided the reactants, my answer is the products) Iron(s) + copper sulfate(aq) → iron

    asked by Marisol
  14. pre-calculus

    a cliff is 125ft high. the angle of depression of a ship from the top of the cliff is 14.6 degrees. determine the distance of the ship from the foot of the cliff. so the angle to the right of the 90 is 14.6 and the side opp. that is 125ft. how do i find

    asked by sam
  15. science

    Phytoplankton are not the only primary producers in the oceans. true or false I think this is false but am not certain. True. However, the great majority of primary producers is phytoplanton, however, there are sea grasses, and floating seaweed. There is a

    asked by Suzi
  16. Chemistry

    I need major help with this problem! especially with the first equation that is used... A buffer is prepared by adding 115 mL of 0.20M NH3 to 145 mL of .15M NH4NO3. What is the pH of the final solution? Use the Henderson-Hasslebalch equation.

    asked by Rachel
  17. physics (please help)

    Four 20 ohm resistors are connected in parallel and the combination is connected to a 20 V emf device. The current in any one of the resistors is: A) 0.25 A B) 1.0 A C) 4.0 A D) 5.0 A E) 100 A I get B V=IR I= 20V/20 ohms = 1 A for any one of the resistors

    asked by susane
  18. Geomentry

    I have to use a # line to find the ratio of the segment lengths. BD:CF point B is on the # 2. point D is on the # 9. point C is on the # 6, and point F is on the # 13. (How did they arrive with a answer of 1\1?) From B to D is 2 to 9, or 7. From C to F is

    asked by Mack
  19. physics (please check)

    Four 20-ohm resistors are connected in series and the combination is connected to a 20 V emf device. The current in any one of the resistors is: A) .25 A B) 1.0 A c) 4.0 A D) 5.0 A E) 100 A My answer: A R= 20 + 20 + 20 + 20 =80 V= IR 20/80=I I=.25 A

    asked by susane
  20. physics question

    The sum of the emfs and potential difference around a closed loop equals zero" is a consequence of: a) Newton's third law b) Ohm's law c) Newton's second law d) conservation of energy e) conservation of charge For this question: I had picked d conservation

    asked by susane
  21. new Q science

    Give an example of how you've seen the law of conservation of matter in action today. Since we don't know what "you've seen," it is impossible to answer this question. You need to review the law of conservation of matter in your textbook to compare your

    asked by Lisa
  22. safety

    I have to find out if Germany and China have liability insurance and what does it cover? What do you mean if Germany or China? These are sovereign States. What do you mean liability insurance? I have to do a project on Germany and China about whether they

    asked by Amanda
  23. social studies

    What's the second most populous continent? Please check this site. Asia is the most populous. Which is the second most populous -- with 885 million people? http://www.nationsonline.org/oneworld/world_population.htm customs passed from parent to child is ?

    asked by ed
  24. science

    Mercury is a liquid metal with a mass density of 13.6g/cm. What is the mass of 10.0 centimeters cubed of mercury? Your units for the mass density should be g/cm^3. To get the mass of any volume V, multiply the mass density by V. In your case, the Volume is

    asked by Amber Smith
  25. algebra

    I trust you know about y = mx + b Realize that when you are given the x or y intercepts, you are really just given two points, in your case the points (4,0) and (0,-2) So it is easy to find the slope, (-2-0)/(0-4) = 1/2 Take it from there Determine the

    asked by Reiny
  26. sociology

    Give at least two specific examples of stratification? Give at least two specific examples from your personal experiences that demonstrate stratification. For example, describe where you have observed stratification in the workplace, the media, home, or

    asked by Anonymous
  27. science

    then how do u find: the volume of the H2O released, measured at 220 degrees C and 735mm Hg? What are you starting with? The volume of H2O released would depend on the original volume before being raised to that temperature. Please repost question with

    asked by Anonymous
  28. precal!

    Prove: (3cosx + 4sinx)^2 + (4cosx - 3sinx)^2=5 ...this is all under the square root sign. I get 9cos^2x + 16sin^2x +16cos^2x + 9sin^2x now i know that sin^2 equals 1-cos^2....so would that be 9cos^2x + 17-cos^2x+16cos^2+ 10cos^2x? if not please help..and

    asked by linds
  29. China

    Also, I need to know if China has any speed laws? The Road Traffic Safety Law of the People's Republic of China is a law which was passed by the National People's Congress of the People's Republic of China on October 28, 2003, But if you ever visit there,

    asked by Cindy
  30. chem

    Liquids A and B form an ideal solution. A certain solution contains 25 mole % of A, whereas the vapor in equilibrium with the solution at 25 degrees C contains 50. mole % of A. The heat of vaporization of A is 5 kcal/mol; that of B is 7 kcal/mol. a)

    asked by Chris
  31. please check (physics)

    Current flows out of a 110V source through a 10 ohm resistor and then through parallel branches, one containing a 20 ohm resistor and the other a 30 ohm resistor. Find V I R P V I R P 50 5 10 250 60 3 20 180 60 2 30 120 _____________________________ 110 5

    asked by susane
  32. Accounting help please!!!!!!!!!!

    Your friend has just come home from their job at a hamburger shop feeling really good because their boss said that they worked so well they were a real asset to the company. Using the definition of an “asset” explain whether your friend would meet the

    asked by Jayde
  33. Chemistry

    A cement compound CaO.Al2O3.10H2O gives certain peaks when using the powder diffraction method. The compound now increases its water of crystallization to become CaO.Al2O3.11H2O.Will the diffraction pattern obtained be basically the same as the former,

    asked by Bhupinder
  34. college chemistry

    need to know what is the theoretical moles of NaCl Any number you choose. The molar mass is about 58.5 if that is what you mean?

    asked by Jen
  35. Genral Science

    What C word defines a substance that speeds a chemical reaction without being consumed? http://en.wikipedia.org/wiki/Catalysis

    asked by stuart
  36. medical

    What do leukemia sufferers have too many of? Even though I know the answer, I searched Google under the key words "leukemia" to get these possible sources: http://en.wikipedia.org/wiki/Leukemia

    asked by sally
  37. principles of finance

    A project has intial outlay of 4,000. It has a single payoff at the end of year 4 0f 6,9996.46. What is the internal rat of return for the project (round to the nearest %) need by tonight. Thank You 4000*(1+r)^4 = 6996.46 (I think you typed too many nines

    asked by Jean
  38. linear approx

    I have no idea how to do this, anyone have any hints? Use linear approximation, i.e. the tangent line, to approximate as follows: cubed root 63.6 The equation of the tangent line to at f(x) x=64 can be written in the form y= thanks

    asked by emily
  39. Foreign Languages

    Can someone proofread this spanish paragraph please. here it is in english: 1)

    asked by Kishore
  40. math,correction

    Problem 22 Solve each quadratic equation by completeling the square. x^2 -6x-3 = 0 MY answer: x = 3 +- 2 radical (3) Problem 28 2x^2+10x+11=0 My answer: x = -2.5 +- 0.5 radical (3) Problem 38 Find two consecutive positive integers such that the sum of

    asked by jasmine20
  41. math,correction

    Problem 10 use the quadratic formula to solve each of the following quadratic equations. 2x^2-5x = 3 My answer: solutions are 3 and - (1)/(2) Problem 16 3x^2-2x+1=0 My answer: (2+- radical (-8))/(6)

    asked by jasmine20
  42. math,correction

    Problem 48 A garden area is 30ft long and 20ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft ^2, what is the width of the path? My answer: 2 radical (2)i your answer is correct.. you are very good at this

    asked by jasmine20
  43. French

    I hate asking for help, but I have to, I hope someone would be able to help me. I missed3 days of french. we are doing passe compase Juliette (aller/rester/faire) Elle____________ A annecy en juin Elle _____________ quatre semaines la-bas Elle _________

    asked by Mike
  44. science

    What is all matter made up of? Are you searching for atoms, electrons and/or protons? I hope this helps. Thanks for asking.

    asked by Jenna
  45. reading/english

    Identify the pronouns(s)andin the following sentenceas personal,reflexive,intensive,demonstrative, interrogative,relative or indefinite. James designedthe building himself Please note that we don't do students' homework for them. Our tutors try to give you

    asked by shaya
  46. Government

    What does the fact that "aliens" are generally are not allowed to vote show about American beliefs? I looked all through my book but it doesnt say anything about voting rights of aliens. Can someone please help me(= There are no voting rights for those who

    asked by maddie
  47. science

    how many combinations are possible in the haploid gametes for a fruit fly which ahs 4 pairs of chromosomes

    asked by lisa
  48. science

    Write down five atoms that you've interacted with today. It will depend on what you have done today. For me (and you will have your own set) Aluminium (in the drinks can) Potassium-40 (it was in the banana I had for breakfast) Carbon (in the plastic in

    asked by Lisa
  49. shakesepeare

    These are the only references I can find that put "Shakespeare" and "Kurtz" together! http://www.google.com/search?hl=en&rls=com.microsoft:en-us:IE-SearchBox&rlz=1I7SUNA&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=shakespeare+kurtz&spell=1 I have never read

    asked by Writeacher
  50. Religion

    In the role of religion in the U.S, how does it compares to Egypt's religion, and how is they different? Thank you for using the Jiskha Homework Help Forum. Here is some help on religion in Egypt: http://en.wikipedia.org/wiki/Religion_in_Egypt Egypt has a

    asked by cheryl
  51. geography/geology

    i need a brief geological history of region where gabbro, schist and sandstone are formed and found These three rocks are examples of igneus, metamorphic, and sedimentary rocks. Check these sites for more information. http://en.wikipedia.org/wiki/Gabbro

    asked by bonita
  52. geological radioactivity

    What ihe basis for the determination of Uranium 238-Lead radiometric date of 1120 ma for granite Wouldn't it be the ratio of U238 and lead in the granite? I do not think so, i have actually answer the question explaing it in words but i am not sure of it

    asked by bonita
  53. Statistics

    3 students will represent your school at a conference at the state capital. A drawing will be held to select the 3 representatives from a group of 5 finalsts. If you and your friend are both finalists, what are the chances that both of your names will be

    asked by Tony
  54. simple interest

    What is the amount after 1 year on $315 invested at 7%, if interest is simple interest? Multiply $315 by .07 to find the interest earned. Add this figure to $315 to find the total at the end of one year.

    asked by victoire
  55. physics

    How do I convert from kg to Newtons? You cant. kg is mass, newtons is force. If a mass is in a gravity field, then force= mass*g where g the graviational field constant is in newtons/kg (or m/s^2)

    asked by CJ
  56. SAFETY

    I need to know what kind of children's traffic safety education programs for pedestrians;bicycle or car safety they have in Germany as well as China Thank you

    asked by Amanda
  57. China

    I have to know the the punishment in China is for driving under the influence of alcohol (BAC) and are selt belts required? I only know that seat belt are required. And that a lot of get in car crashed there and don't wear seat belts.

    asked by Cindy
  58. math

    does anybody know what the slope of 20,1 7,-19 Four numbers do not define a slope, unless you consider them as two pairs of (x,y) coordinates. Please be more precise about what you are talking about

    asked by will
  59. presedent

    What president was shot while walking to California Governor Jerry Brown' office? I can't find any reports of a president being shot while walking to Governor Brown's office. I think is was Gerald Ford. Yes. Two different women tried to shoot Gerald Ford

    asked by Amy
  60. animals

    What was the first bird domesticated by man? Wasn't it the goose. But I don't know if I am right

    asked by kate
  61. Safety

    i need to know what kind of children's traffic safety education programs for pedestrians;bicycle or car safety they have in Germany as well as China Thank you

    asked by Cindy
  62. Foreign Languages

    Proofread Please!!! ¡El acontecimiento que ha ocurrido hoy eso ha dado lugar a este día que era extraordinario ha sido que he conseguido presentes porque es mi cumpleaños hoy! Hoy en la universidad de Carolina del Norte en la colina de la capilla mis

    asked by Stephen
  63. math

    drama club sold adult tickets for $8 and kid tickets for $5. for the final performance a total of 226 tickets were sold for a total of $1670. how many adult tickets were sold for the performance? X = # of adult tickets Y = # of kid tickets X + Y = 226 8X +

    asked by mario
  64. Geometry

    The length of a rectangular playing feild is 5ft lessthan twice the width. If the perimeter of the playing field is 230ft, what is the length of the playing field. x=length y=width we know: 2x+2y=230 x+5=2y Solve using systems. Easiest is to substitute x+5

    asked by Jason
  65. English Language

    1. Which of the following is NOT a West Germanic language? Yiddish Afrikaans Frisian High German Gothic 2. One of the following pairs illustrates the workings of Verner's Law. Which one is it? plate/flat?gelatin/cool freeze/frozen was/were tooth/dental 3.

    asked by Jack
  66. math

    What is the product of 10 times the square root of 2? Sorry guys. I meant 10 times [5 times the square root of 2].

    asked by Emily
  67. history

    hi, i really need help by the end of the day. an improved type of fencing that enabled farmers tp enclose land on treeless plains barbed wire??

    asked by chrissy
  68. scienc

    What is the minimum umber of unequal forces whose vector sum can equal zero? Three. Thank you....

    asked by ijust
  69. Government

    A police officer has arresteda suspect and produced evidence of wrongdoing.List 3 questions you would ask the officer to determine whether the freedom and the security of the suspect have been violated. Can I just list 3 questions from the miranda rights

    asked by j
  70. science

    i know the steps but i still cant seem to write skeleton equations and balance them. can you help

    asked by nelson
  71. goverment

    compare and contrast the virginia plan v.s. new jersy plan We'll be happy to critique your answer.

    asked by ashley
  72. Name the shape

    height X base 1 + base 2 divided by 2 triangle i think i am not possitive.

    asked by Amanda
  73. mustangs/horses

    Does anybody know any really good web sites on mustangs or horses? Thank you http://en.wikipedia.org/wiki/Mustang_(horse) http://www.ansi.okstate.edu/breeds/horses/mustang/

    asked by AL
  74. business

    please could someone explain to me what the 4 factors of the marking mix are. I searched for marking mix and found nothing. Please check the spelling and repost.

    asked by sean
  75. fish

    I think the michigan fish is either blue gill or sun fish? Am I right. If not what is it. I believe that it is the Rainbow trout According to this site, Michigan's state fish is the brook trout. http://www.enchantedlearning.com/usa/states/michigan/

    asked by melody
  76. movies

    In 2003 who was Freddies biggest problem A Himself B Jason C Fannie Mae I would be B Jason

    asked by Amy
  77. Foreign Languages

    Can someone proof read this spanish paragraph for me. La decisión más grande de mi vida que he tenido que hacer frente, me fue dada en High School secundaria. En High School secundaria, estaba en mi año menor y jugué a fútbol del varsity. En el

    asked by Kishore
  78. red panda bear

    Need to find good web site on a red panda bear. Seen lots none any good. Please check these sites carefully. Then post a specific question if you don't find what you need in these sites. http://www.wellingtonzoo.com/animals/animals/mammals/panda.html

    asked by jacob
  79. Safety

    I need to know what kind of children's traffic safety education programs for pedestrians;bicycle or car safety they have in Germany as well as China Thank you

    asked by Cindy
  80. boxing

    For class i have to answer this question. What boxing class is heaviest - flyweight, bantam weight or feather weight? I don't know anything about boxing because i am a girl. Thank you for using the Jiskha Homework Help Forum. Here is the site for the

    asked by marths
  81. medical

    What does "CPR" stand for in medical emergencies? crp are stands for cardio-pulmonary resuscitation

    asked by sally
  82. science

    What star other than the sun is closest to the earth? Proxima Centauri, which is part of the alpha Centauri three-star system

    asked by sally
  83. math

    This is a "trial and error" type question. Algebra alone won't help you. First see what you could do buying 19 cow brains ($95) with $5 left. That could get you ten sheep brains ($1) and two pig brains ($4). The total would be only 31 total. Not enough. So

    asked by drwls
  84. principles of finance

    You are considering the purchase of XYZ Company's preferred stock, which pays a perpetual annual dividend of $8 per share. If the appropriate discount rate for this investment is the price of one share of syock? need a answer by tonight. Thank You!

    asked by Jean
  85. Finance

    Preferred stock differs from common stock in that preferred stock: Preferred stock always receives a stated interest payment if the company is solvent, but they are subject to being called. Bondholders have first call on payment. Common stock dividends are

    asked by Jean
  86. hum

    In this class, we are using the Internet's information dissemination capabilities for distance learning. Give other examples of information exchange using the following modalities and including users of each modality: 1. the Internet 2. an intranet 3. an

    asked by stacy
  87. finance

    A case wine costs 128 Euros. If the exchange rate for one U.S. dollar is equal to 0.7442 Euro, What is the price of a case of French wine in U.S.dollars? My answer is $95.00 is it right. You have it backwards. If you divide $128 by 0.7442, you'll find that

    asked by Jean
  88. math,correction

    Solve for x. Problem #22 25x^2 = 13 My answer: x = + - radical (13)/(5) Problem #32 2 (x - 5 )^2 = 3 My answer: x = 5 +- radical (3)/(2) Problem #42 Solve for x x^2+4x+4=7 (hint factor the left-hand side) My answer: x = -2 +- radical (7)

    asked by jasmine20
  89. Math - vectors

    In the product F(vector)=q(V(vector)xB(vector), take q = 4, V(vector)= 2.0i + 4.0j + 6.0k and F(vector)= 136i -176j + 72k. What then is B(vector) in unit-vector notation if Bx = By?

    asked by sam
  90. finance

    perferred stock differs from common stock in thay prefrred stock: Which 1 a. usually has a maturity date. b. can never be called. dividends are generally fixed in amount. c. dividends are deductible for tax purposes.

    asked by Jean
  91. fiannce

    the fixed costs for a frim drop by 25costs%. Prior to breakthrough fixed were $100.000 and united contribution margin was and remains at 5.00. The new amount of break-even units will be: is it 15,000 or 20.000 why? Thank You

    asked by Jean
  92. Foreign Languages

    La decisión más grande de mi vida que he tenido que hacer, me fue dada en la Escuela secundaria, estaba en mis tres ano y jugue a cautro anos en el equipo fútbol del varsity. En el comienzo de la temporada, sabía que iba a hacer una cantidad increíble

    asked by jack
  93. analogies (just one)-- please help

    How about -- wolf:animal :: bird: rail wolf:_::_:rail

    asked by Ms. Sue
  94. Germany and China

    i need to know what kind of children's traffic safety education programs for pedestrians;bicycle or car safety they have in Germany as well as China Thank you

    asked by Amanda
  95. math 11 princapls

    t+3/2-4/2t=0

    asked by maria
  96. Foreign Languages

    Proofread Please!!!! La decisión más grande de mi vida que he tenido que hacer, me fue dada en la Escuela secundaria, estaba en mis tres ano y jugue a cautro anos en el equipo fútbol del varsity. En el comienzo de la temporada, sabía que iba a hacer

    asked by john
  97. Learning English Vocabulary

    Yes, certainly we will help you. Make sure you have used good dictionaries and online dictionaries and try each word before you post them here. Then we'll know how to help you best. Here are some good online dictionaries. http://www.answers.com

    asked by Writeacher
  98. science

    how many atps are there in one fat molecule with three phosphate tails that have 18 carbons each

    asked by uk
  99. Chem

    This is also from the lab concerning activity serious of metals and calculation of electrode portentions... Question: What are the standard conditions for measuring potentials? Does that mean... Standard condition for temp: 298K Concentration: 1 molar

    asked by Marisol
  100. French

    Someone please correct this. Ma soeur et je toujours ai se ressemblent comme deux gouttes d'eau. Tout le monde nous avons rencontré avons pensé nous étions des jumeaux. Elle est une année plus vieille que me. Nous avions des cheveux sombres et yeux

    asked by Anonymous
  101. Lord of the Flies

    I apologize, I posted the wrong question on my last post! Oops! The actual question was:: In Chapter 3, why cant Jack get the pig to stay on his spear? Thanks again! http://www.sparknotes.com/lit/flies/section3.rhtml =) why cant jack get the pig to saty on

    asked by Kaitlin S.
  102. English

    Which of the following is NOT a West Germanic language?

    asked by Jack
  103. math,help,algebra

    Can someone show me how to solve these types of problems. i have two that are driving me nuts.as of now. Problem #1 Simplify: 2radical(12) + 4 radical (27) Problem #2 evaluate if possible the following i am going to describe it in the index it has a 3 then

    asked by jasmine20
  104. social studes

    Please clarify what your question is. Thanks. =) the most sucessful day for new zealand

    asked by Writeacher
  105. principles of finance

    You are considering the of xyz company's perpetual preferred stock, which pays a perpetual divend of $8 per. If the appropriate discount rate for this investment is 14%, what is the price of one share of this stock? Thank you. Preferred stock differs from

    asked by Jean
  106. science

    What is the atomic number of a lead atom? Since this is not my area of expertise, I searched Google under the key words "lead atomic number" to get these possible sources: http://www.chemicalelements.com/elements/pb.html

    asked by Lisa
  107. math

    how about (5-3)x2 + 8(5-2) ? To me these are really just "puzzles" and do not actually require much mathematical ability. The best and often only way is to by 'trial and error'. what is the rule when grouping numbers? example I want the answer to be 28. 5

    asked by Reiny